Through Beam Sensors
In through beam sensor , the emitter and receiver are housed in different cases that are separated from each other .Here receiver is placed within the line-of-sight of the emitter. The emitter transmits light to the receiver only in one direction. If an object interrupts the light , then intensity of the light decreases . So that output voltage or current level changes . Sensor senses this change in signal and acts accordingly . These sensors offer long sensing distances and are highly reliable as they directly detects the interruption of the light . These are suitable for applications where precise object detection is required . Through beam photoelectric sensors have a longer detection range than retroreflective and diffused photoelectric sensors . Because the light only has to travel in one direction to get from the emitter to the receiver .
Limitation : These are costly as we need to buy both emitter and transmitter that require two cables . These sensors requires more space as they require two cables that should be mounted in opposite directions . It must install at two points on system i.e., emitter and receiver . It cannot detect transparent objects because light can travel straight through the object to the receiver .
Photoelectric Sensor
A photoelectric sensor is a type of sensor used to detect the presence or absence of objects, as well as to measure distance, based on the principle of light reflection or interruption. It typically consists of a light transmitter and a receiver, which are positioned opposite each other with a gap between them.
Here in this article, we will discuss the definition of photoelectric sensors, the construction and working, various types, and the characteristics briefly. There are many advantages and applications of photoelectric sensors in day-to-day life. Let us discuss all those in this article.
Table of Content
- Photoelectric Sensor
- Components and Construction
- Types
- Characteristics
- Advantages
- Disadvantages
- Applications
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